EP0985401B1 - Method for inhibiting corrosion in an aqueous aerosol or foam hair styling composition - Google Patents

Method for inhibiting corrosion in an aqueous aerosol or foam hair styling composition Download PDF

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Publication number
EP0985401B1
EP0985401B1 EP99306723A EP99306723A EP0985401B1 EP 0985401 B1 EP0985401 B1 EP 0985401B1 EP 99306723 A EP99306723 A EP 99306723A EP 99306723 A EP99306723 A EP 99306723A EP 0985401 B1 EP0985401 B1 EP 0985401B1
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EP
European Patent Office
Prior art keywords
hair
hair styling
styling composition
acrylate
corrosion
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EP99306723A
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German (de)
English (en)
French (fr)
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EP0985401A2 (en
EP0985401A3 (en
Inventor
Ching-Jen Chang
Andrea Claudette Keenan
Curtis Schwartz
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Rohm and Haas Co
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Rohm and Haas Co
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/04—Dispersions; Emulsions
    • A61K8/046—Aerosols; Foams
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/55—Phosphorus compounds
    • A61K8/556—Derivatives containing from 2 to 10 oxyalkylene groups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • A61K8/8152—Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00—Preparations for care of the hair
    • A61Q5/06—Preparations for styling the hair, e.g. by temporary shaping or colouring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/52—Stabilizers
    • A61K2800/526—Corrosion inhibitors

Definitions

  • the present invention relates to aerosol or foam hair styling compositions delivered from metal containers and a method of inhibiting corrosion of the metal container holding the hair styling composition. More particularly, the present invention relates to a method of inhibiting corrosion to tin plate or aluminum aerosol cans caused by the hair spray composition without compromising performance of the hair spray product or without the expense of special can liners. In a preferred embodiment, the present invention also relates to non-corrosive aqueous hair styling compositions containing low (80 weight percent or less) volatile organic compound (VOC) concentrations.
  • VOC volatile organic compound
  • Hair styling products such as hair sprays, styling gels, spray gels and mousses are used on hair to hold the hair in place.
  • the hair styling products when applied, form a thin film or weld of resin on the hair, most efficiently in the seam between adjacent hair fibers or at a point where the fibers cross one another, and, as a result, hold the hair in a particular shape or configuration.
  • Hair styling products can be applied to the hair in several ways.
  • One of the most desirable ways is to formulate the hair fixative resin under pressure in a system containing solvent and propellant.
  • the resin is delivered to hair as a fine mist where the propellant is used to drive the product out of its container onto the hair.
  • the container is a tin plated metal or aluminum can.
  • Preventing the hair spray formulation from corroding the metal container during storage is a key parameter in formulating an aerosol hair spray suitable for the trade.
  • the problem addressed by the present invention is to reduce the tendency of hair fixative resin formulations to corrode metal containers in aerosol formulations, particularly low-VOC formulations, without negatively affecting the performance of the hair styling product or its cost effectiveness, and without affecting the ability to prepare the hair fixative resin polymer in high yield with low residual monomer and in a form easily used by the hair styling composition formulator.
  • GB-A-1 595 649 teaches aerosol hair spray compositions, and teaches also that the addition of small amounts of water results in an aerosol formulation with improved stability and reduced can corrosion.
  • U.S. Patent No. 4,196,190 discloses acrylic hair fixative resins containing 10-30% of an alkyl acrylate, 41-60% of methyl methacrylate, 5-20% of hydroxyethyl methacrylate and 10-30% of methacrylic acid. Although disclosing that water can be used in a hair styling composition containing the acrylic hair fixative resins, this reference does not disclose or suggest methods for overcoming the problems associated with hair styling compositions regarding corrosion.
  • U.S. Patent No. 5,658,558 although disclosing how to improve the performance of acrylic resins in low-VOC systems, also does not disclose how to overcome corrosion problems.
  • phosphate esters as Primary Anionic Emulsifiers for Acrylic Latex Synthesis
  • N. Shachat and Y.Z. Li at Water-Borne & Higher Solids and Powder Coatings Symposium, New La, LA (USA), February 24-26, 1993.
  • GB Patent No. 2,203,156 discloses corrosion resistant compositions for metal surfaces coated with acrylic resin and organic phosphate/phosphite mixtures. Neither of these references discloses how to overcome the problems associated with aerosol hair styling compositions regarding corrosion.
  • the present invention seeks to overcome deficiencies of the prior art hair fixative resin technology by using hair fixative resins prepared by emulsion polymerization using selected emulsifiers as processing aids to minimize corrosion in the hair styling formulation while retaining other beneficial hair fixative properties.
  • an aqueous aerosol or foam hair styling composition comprising (a) from 1 to 15 weight percent of at least one acrylic hair fixative resin, based on total weight of the aqueous aerosol or foam hair styling composition, wherein the acrylic hair fixative resin is a polymer comprising as polymerized units from 2 to 100 weight percent of at least one (C 1 -C 12 )alkyl (meth)acrylate, based on total weight of the acrylic hair fixative resin; and (b) from 10 to 70 weight percent of at least one propellant, based on total weight of the aqueous hair styling composition; wherein the hair fixative resin is an emulsion polymer prepared in the presence of a phosphate ester emulsifier.
  • the aforementioned aqueous aerosol or foam hair styling composition further comprises volatile organic compounds in a concentration up to 98 weight percent, based on total weight of the aqueous hair styling composition.
  • the present invention provides an improved method for inhibiting corrosion in an aqueous aerosol or foam hair styling composition as described as above, wherein the improvement comprises preparing the acrylic hair fixative resin by emulsion polymerization in the presence of a phosphate ester emulsifier.
  • the method of the present invention is useful for improving the corrosion resistance of aerosol or foam hair styling formulations when the hair styling formulation is provided in metal containers, such as aerosol cans.
  • metal containers such as aerosol cans.
  • emulsifiers that is, phosphate esters
  • an “aqueous hair styling composition” we mean a hair spray or mousse (aerosol or foam) that is used on hair to hold the hair in a particular shape or configuration.
  • the hair styling composition is a hair spray.
  • the aqueous hair styling compositions typically will contain at least 2% and up to 98% water, more typically, from 25 to 70% water, based on the total weight of the aqueous hair styling composition.
  • low-VOC we mean the hair styling composition contains 80% or less volatile organic compounds, that is, typically 10% or more of water.
  • the hair styling composition contains less than 70%, and more preferably 55% or less, VOC.
  • the hair styling composition may contain no VOC.
  • (meth)acrylate means methacrylate or acrylate.
  • (meth)acrylic acid means methacrylic acid or acrylic acid.
  • unsaturated dicarboxylic acid monomer refers to monoethylenically unsaturated dicarboxylic acids containing 4 to 8, preferably from 4 to 6, carbon atoms per molecule and anhydrides of the corresponding dicarboxylic acids.
  • Dicarboxylic acid monomers include, for example, maleic acid, maleic anhydride, fumaric acid, ⁇ -methylene glutaric acid, itaconic acid, itaconic anhydride, citraconic acid, mesaconic acid, cyclohexenedicarboxylic acid, and water-soluble salts thereof.
  • soluble hair fixative resins we mean herein that the compound described is soluble in the hair styling composition.
  • insoluble hair fixative resins we mean herein that the compound described is insoluble in the hairstyling composition.
  • VOC are compounds containing at least one carbon atom and are typically used as solvents or propellants in hair styling compositions.
  • VOC include, for example, C 1 -C 12 straight or branched chain alcohols such as methanol, ethanol, propanol, isopropanol and butanol; C 1 -C 12 straight or branched chain hydrocarbons such as methane, ethane, propane, isopropane, isobutane, pentane, isopentane and butane; or ethers such as dimethyl ether and dimethoxymethane.
  • Preferred VOC are selected from one or more of ethanol, isopropanol, n-propanol, dimethoxymethane, dimethylether and C 1 -C 12 straight or branched chain hydrocarbons.
  • Soluble hair fixative resins that are useful are soluble in the hair styling composition "as is" or upon neutralization of some or all of any acid groups contained in the soluble hair fixative resins.
  • the soluble hair fixative resins, when sprayed, preferably have viscosities less than 30 x 10 -3 pascal•seconds (Pa•sec) (or 30 centipoise), and more preferably less than 25 x 10 -3 Pa•sec, in an aerosol concentrate.
  • polymers useful as hair fixative resins in practicing the present invention may be any acrylic emulsion polymer containing as polymerized units from 2 to 100%, preferably from 5 to 95%, more preferably from 45 to 90%, of at least one (C 1 -C 12 )alkyl (meth)acrylate, based on total weight of the acrylic hair fixative resin.
  • the (C 1 C 12 )alkyl (meth)acrylate comprises substantially (C 1 -C 10 )alkyl (meth)acrylates, and more preferably (C 1 -C 8 )alkyl (meth)acrylates.
  • the polymer may contain, as polymerized units, from 2 to 70%, and preferably from 2 to 26%, of at least one hydroxyalkyl (meth)acrylate.
  • the alkyl group of the hydroxyalkyl (meth)acrylate is preferably a (C 1 -C 5) alkyl group.
  • the hydroxyalkyl (meth)acrylate is preferably selected from one or more of hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, hydroxybutyl (meth)acrylate and hydroxypentyl (meth)acrylate. More preferably the hydroxyalkyl (meth)acrylate is selected from one or more of hydroxyethyl methacrylate and hydroxypropyl acrylate.
  • the polymer may contain, as polymerized units, from 2 to 50% of at least one C 3 -C 8 monoethylenically unsaturated monocarboxylic acid monomer.
  • the C 3 -C 8 monoethylenically unsaturated monocarboxylic acid monomer is preferably selected from one or more of acrylic acid, methacrylic acid and crotonic acid. More preferably, the C 3 -C 8 monoethylenically unsaturated monocarboxylic acid is methacrylic acid.
  • the polymer may contain, as polymerized units, from 1 to 25% of at least one C 4 -C 8 monoethylenically unsaturated dicarboxylic acid monomer.
  • the C 4 -C 8 monoethylenically unsaturated dicarboxylic acid monomer is preferably selected from one or more of itaconic acid, maleic acid and the corresponding anhydrides.
  • the C 4 -C 8 monoethylenically unsaturated dicarboxylic acid monomer is itaconic acid.
  • the polymer may also contain, as polymerized units, additional vinyl monomers, such as for example, vinyl acetate, vinyl neodecanoate, vinylpyrrolidone, octylacrylamide and t-butylaminoethyl methacrylate.
  • additional vinyl monomers such as for example, vinyl acetate, vinyl neodecanoate, vinylpyrrolidone, octylacrylamide and t-butylaminoethyl methacrylate.
  • the hair fixative resin comprises as polymerized units (i) from 5 to 95%, and more preferably from 45 to 90%, of at least one (C 1 -C 12 )alkyl (meth)acrylate, (ii) from 2 to 70%, and more preferably from 2 to 26%, of at least one hydroxyalkyl (meth)acrylate and (iii) from 2 to 50%, more preferably from 2 to 30%, and most preferably from 12 to 26%, of at least one C 3 -C 8 monoethylenically unsaturated monocarboxylic acid monomer.
  • the hair fixative resin further comprises as polymerized units from 1 to 25% of at least one C 4 -C 8 monoethylenically unsaturated dicarboxylic acid monomer.
  • the C 4 -C 8 monoethylenically unsaturated dicarboxylic acid monomer is from 2 to 10% of itaconic acid.
  • the (C 1 -C 12 )alkyl (meth)acrylate is selected from one or more (C 1 -C 5 )alkyl (meth)acrylates such as, for example, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate and pentyl (meth)acrylate.
  • the (C 1 -C 12 )alkyl (meth)acrylate component comprises at least one (C 1 -C 3 )alkyl methacrylate and at least one (C 2 -C 5 )alkyl acrylate.
  • the (C 1 -C 12 )alkyl (meth)acrylate component comprises methyl methacrylate and butyl acrylate.
  • the amount of the at least one (C 1 -C 3 )alkyl methacrylate in the hair fixative resin is preferably from 5 to 71%, more preferably from 41 to 60%, based on the total monomers used to form the hair fixative resin.
  • the amount of (C 2 -C 5 )alkyl acrylate is preferably from 2 to 67% and more preferably from 10 to 30%, based on the total monomer used to form the acrylic hair fixative resin.
  • the (C 1 -C 12 )alkyl (meth)acrylate is from 2 to 67 weight percent of at least one (C 2 -C 5 )alkyl acrylate and from 5 to 71 weight percent of methyl methacrylate.
  • the proportions of the monomers comprising the acrylic hair fixative resin are selected to provide for an optimum hydrophilic/hydrophobic balance. This optimum balance provides, especially in a low-VOC hair styling composition, curl retention under humid conditions, moisture resistance, shampoo removability, feel or stiffness, and desirable aesthetics to the hair, such as minimal flaking of the hair fixative resin.
  • the acrylic hair fixative resins are preferably added to the hair styling composition to provide a total concentration of from 1 to 15%, more preferably from 4 to 7%, of the acrylic hair fixative resins, based on the total weight of the hair styling composition.
  • the acrylic hair fixative resins may be prepared by conventional emulsion polymerization methods well known to those skilled in the art.
  • the acrylic hair fixative resins are made by a continuous in-line emulsification process.
  • U.S. Patent Nos. 3,245,932, 3,453,245 and 4,196,190 may be consulted for further general and specific details on suitable emulsion polymerization methods.
  • emulsifiers used to prepare the hair fixative resins comprise one or more phosphate ester emulsifiers.
  • the phosphate ester emulsifier is selected from one or more long-chain alkyloxypoly(alkyleneoxide), long-chain alkylaryloxypoly(alkyleneoxide), long-chain alkyl and long-chain alkylaryl mono- and di-esters of phosphoric acid, such as (C 8 -C 18 )alkylaryloxypoly(alkyleneoxide), (C 10 -C 18 )alkyloxypoly(alkylene-oxide), (C 10 -C 18 )alkyl, and (C 8 -C 18 )alkylaryl mono- and di-esters of phosphoric acid.
  • the phosphate ester emulsifier is one or more (C 8 -C 18 )alkylaryloxypoly(alkyleneoxide) and (C 10 -C 18 )alkyloxypoly(alkylene-oxide) mono- and di-esters of phosphoric acid, and corresponding salts (such as, for example, sodium and ammonium salts).
  • the poly(alkyleneoxide) moieties of the phosphate ester are based on one or more of ethylene oxide and propylene oxide; the average number of alkylene oxide units per group is typically from 2 to 100, preferably from 3 to 50, more preferably from 4 to 20, and most preferably from 6 to 10.
  • the long-chain alkyl and long-chain alkylaryl groups are typically selected from one or more (C 8 -C 18 )alkylaryl and (C 10 -C 18 )alkyl groups; preferred long-chain alkyl and long-chain alkylaryl groups include, for example, nonylphenyl, t-octylphenyl, lauryl, tridecyl and stearyl.
  • Suitable acrylic hair fixative resins for use in the hair styling compositions include, for example, those described in U.S. Patent No. 4,196,190, that is, polymers containing 10-30% of an alkyl acrylate, 41-60% of methyl methacrylate, 5-20% of hydroxyethyl methacrylate and 10-30% of methacrylic acid.
  • the acrylic hair fixative resin may be soluble or insoluble in the hair styling composition.
  • acrylic hair fixative resins contain acidic groups, such as carboxylic acid groups, these may be neutralized by conventional techniques with at least one base to promote solubility of the resins in the hair styling composition.
  • the acrylic hair fixative resins are preferably neutralized with at least one neutralizer.
  • Bases that will neutralize the soluble hair fixative resins may be selected from one or more amines, alkali or alkaline earth metal hydroxides, and ammonium hydroxide.
  • Suitable amine neutralizers include, for example, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, N,N-dimethyl-2-amino-2-methyl-1-propanol, mono-isopropanolamine, triisopropanolamine, ethanolamine, triethanolamine and morpholine.
  • Suitable alkali or alkaline earth metal hydroxides include, for example, sodium hydroxide and potassium hydroxide.
  • the neutralizer is selected from one or more of 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, N,N-dimethyl-2-amino-2-methyl-1-propanol, potassium hydroxide, triethanolamine and triisopropanolamine.
  • the amount of neutralizer added to the hair styling composition is that amount needed to provide solubility of the soluble hair fixative resins in the hair styling composition. Typically from 5 to 100%, preferably from 10 to 100%, more preferably from 50 to 100%, and most preferably from 75 to 100%, based on molar equivalents, of the acid groups in the hair fixative resins are neutralized.
  • the aqueous hair resin composition that suspends or dissolves the acrylic hair fixative resin before being added to the hair styling composition is preferably an aqueous emulsion that was obtained from the process that produced the acrylic hair fixative resins.
  • the aqueous emulsion hereinafter called the "acrylic hair resin emulsion,” is typically unneutralized and has a pH from 1.5 to 4.5; optionally the emulsion may be partially neutralized.
  • the acrylic hair resin emulsion preferably contains from 30 to 60% of the acrylic hair fixative resins, greater than 30% water, based on total weight of the emulsion; and 0.05 to 5%, preferably from 0.1 to 2%, and more preferably from 0.3 to 1%, of one or more phosphate ester emulsifiers, based on total weight of the hair fixative polymer.
  • the acrylic hair resin emulsion is prepared substantially in the absence of sulfate or sulfonate type emulsifiers (such as sodium lauryl sulfate, sodium tridecylether sulfate, diester sulfosuccinates, and alkyl or aryl polyether sulfonates), that is, less than 0.05%, more preferably less than 0.01%, and most preferably zero %, based on total weight of the hair fixative polymer.
  • sulfate or sulfonate type emulsifiers such as sodium lauryl sulfate, sodium tridecylether sulfate, diester sulfosuccinates, and alkyl or aryl polyether sulfonates
  • the hair styling composition may also contain surfactants, solvents, propellants, and other preservatives.
  • One or more surfactants may be added to the hair styling composition, typically to reduce the surface tension of the composition.
  • surfactants are present in the hair styling composition, they are preferably present at a concentration of from 0.001 to 1%, based on the total weight of the composition.
  • the surfactants that may be used in the hair styling composition include, for example, anionic, cationic, nonionic and amphoteric surfactants.
  • suitable surfactants include PPG 28 Buteth 35, PEG 75 lanolin, perfluoropolymethyl isopropyl ether, octoxynol-9, PEG-25 hydrogenated castor oil, polyethylene terephthalate, polyethylene glycol 25 glyceryl trioleate, oleth-3 phosphate, PPG-5-ceteth-10 phosphate, PEG-20 methyl glucose ether, glycereth-7-triacetate and n-alkyl substituted lactam (such as n-octyl pyrrolidone).
  • plasticizers may be added to the hair styling composition of the present invention.
  • plasticizers are present in the hair styling composition, they are preferably present at a concentration of from 0.001 to 1%, based on the total weight of the composition.
  • the plasticizers that may be used in the hair styling composition include, for example, dimethicone copolyol, dimethicone, phenyltrimethicones, trialkylcitrates, and others that are known and typically used in the art.
  • One or more solvents may be added to the hair styling composition of the present invention.
  • solvents When solvents are added to the hair styling composition they preferably comprise up to 70%, more preferably up to 55%, of the total hair styling composition, based on the total weight of the hair styling composition.
  • Suitable solvents include, for example, C 2 -C 6 organic alcohols (such as ethanol, isopropanol, n-propanol) and acetone.
  • propellants are used in a low-VOC hair styling composition using an aerosol spray.
  • the propellants are used at a total concentration of from 10 to 70%, more preferably from 30 to 60%, based on the total weight of the hair styling composition.
  • Suitable propellants include, for example, n-butane, isobutane, dimethyl ether, 1,1-difluoroethane, chlorodifluoroethane, chlorodifluoromethane and other chlorofluorocarbons.
  • Preferred propellants are selected from one or more of dimethyl ether, 1,1-difluoroethane, n-butane and isobutane. These propellants are commercially available from a variety of manufacturers.
  • Preservatives that may be used in the hair styling composition include, for example, one or more of isothiazolones, iodopropynylbutyl carbamate, benzyl alcohol, imidazolidinylurea and alkyl parabens.
  • a preferred antimicrobial agent is iodopropynylbutylcarbamate (commercially available from Lonza Inc., Fairlawn, New Jersey)
  • the preservatives preferably comprise from 0.001 to 1% active ingredient in the hair fixative resin emulsion.
  • additives such as those commonly used by those skilled in the art, may be added to the hair styling composition.
  • the other additives used in the hair styling composition will depend upon the type of hair styling composition desired.
  • Other additives include, for example, one or more of fragrances; moisturizers (such as hydrolyzed silk protein and hydrolyzed wheat protein); detangling aids such as panthenol; conditioning agents (U.S. Patent No. 5,164,177 may be consulted for further general and specific details on suitable conditioning agents); emulsifiers; antistatic aids; extracts; proteins; vitamins; dyes; tints; colorants; UV protectors; and corrosion inhibitors.
  • the other additives typically comprise from 0.005 to 5%, and more preferably from 0.01 to 1%, of the hair styling composition.
  • Examples 1-4A describe polymer preparations representative of hair fixative resin polymers of the present invention, including comparative compositions. All ratios, parts and percentages are expressed by weight unless otherwise specified, and all reagents used are of good commercial quality unless otherwise specified. Abbreviations for monomers, emulsifiers and other materials described in the Examples are presented in Table 1. Hair fixative resin monomeric unit composition/emulsifier data are summarized in Table 2.
  • Comparisons of corrosion data for different hair fixative resin formulations are only valid when the pH values of the compositions are similar, that is, within ⁇ 0.5 pH units, preferably within ⁇ 0.2 pH units or less.
  • the pH decreases below about 8
  • the overall degree of corrosion is greater and differences between the polymer/phosphate-ester emulsifier compositions versus the polymer/sulfate-emulsifier compositions are magnified.
  • the pH approaches 9 the overall degree of corrosion generally decreases; however, there is still a significant observable difference between polymer compositions prepared with phosphate-ester emulsifiers versus those prepared with sulfate emulsifiers.
  • the difference in corrosiveness ( ⁇ C) between SLS and phosphate ester prepared emulsion polymers ranges from +0.4 up to +4 for Polymer Compositions 1, 2 and 3 (Table 3).
  • Aerosol hair styling compositions may have pH values from 5 to 10, preferably from 6 to 9.5, and more preferably from 7 to 8.5. Although corrosion is generally less of a problem in aerosol containers for compositions having pH values above 8.5 (depending on the hair fixative resin composition), the higher pH values may detract from the overall hair fixative resin properties due to plasticization of the hair fixative resin. This may lead to poorer high humidity curl retention, lower stiffness and increased tackiness of the resin film on the hair. Residues from the hair fixative resin formulation (such as sulfate and sulfonate emulsifiers) may promote corrosion regardless of the pH.
  • hair fixative resins prepared according to the method required by the present invention allows for improved corrosion resistance over a wide pH range without compromising hair styling performance of the hair fixative resin and also allows the hair styling composition formulator to use lower levels of conventional corrosion inhibitors, further lessening the likelihood of negatively affecting hair fixative resin performance.
  • Hair styling performance properties (such as curl retention, stiffness, drying time, tackiness and film clarity) of hair fixative resins based on Polymer Compositions 1-4 are unaffected by the emulsifier used to prepare the polymer.
  • Table 3 Polymer Composition Corrosion Rating Standard Deviation pH ⁇ C** 1 0.2 0.3 8.7 +1.2 1A-comp 1.4 0.6 8.7 -- 1B 0.2 0.1 8.8 +1.2 1C 0.4 0.25 8.9 +1.0 2-comp 4.3 0.85 7.3 -- 2A 2.2 0.9 7.2 +2.1 2-comp 4.0* 0.0 6.4 -- 2A 0.0* 0.0 6.5 +4.0 3-comp 0.7 0.8 8.8 -- 3A 0.3 0.2 8.4 +0.4 4A 1.2 0.3 8.8 -- 4-comp 0.8 0.9 8.8 -- * based on average of 6 observations, others on 9 observations ** difference in corrosion rating between SLS polymer and phosphate ester polymer
  • the remaining monomer emulsion feed was then fed over 120 minutes while maintaining a temperature of 83°C.
  • a cofeed initiator solution containing 0.73 g ammonium persulfate and 79.0 g deionized water was gradually added simultaneously with the monomer emulsion feed over 120 minutes.
  • the reaction mixture was "chased" with a ferrous sulfate, t-butyl hydroperoxide, ammonium persulfate and d-isoascorbic acid combination to reduce residual monomer levels.
  • the reaction mixture was then cooled to room temperature and filtered.
  • the composition of the resulting polymer was 47 MMA/25 BA/10 HEMA/13 MAA/5 IA.
  • the amount of PPE-1 emulsifier was 0.6%, based on total monomer weight.
  • An emulsion polymer composition was again prepared according to the procedure in Example 1 except for the surfactant employed and its total amount based on monomer.
  • Sodium lauryl sulfate (28% aqueous solution) was charged at 8.5 g as part of initial reactor charge and 4.25 g as part of the monomer emulsion.

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EP99306723A 1998-09-11 1999-08-24 Method for inhibiting corrosion in an aqueous aerosol or foam hair styling composition Expired - Lifetime EP0985401B1 (en)

Applications Claiming Priority (2)

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US9989898P 1998-09-11 1998-09-11
US99898P 1998-09-11

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EP0985401A2 EP0985401A2 (en) 2000-03-15
EP0985401A3 EP0985401A3 (en) 2001-09-05
EP0985401B1 true EP0985401B1 (en) 2007-05-30

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US (1) US6368575B2 (enExample)
EP (1) EP0985401B1 (enExample)
JP (1) JP4240676B2 (enExample)
KR (1) KR20000022807A (enExample)
CN (1) CN1140249C (enExample)
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US20030147833A1 (en) * 2001-12-20 2003-08-07 L'oreal Reshapable hair styling non-rinse composition comprising (meth)acrylic copolymers
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DE10321373A1 (de) * 2003-05-13 2004-12-02 Beiersdorf Ag Versprühbare, beim Auftreffen des Sprühnebels auf eine Frisuroberfläche einen instabilen und rasch zerfallenden Schaum bildende polymerhaltige Zubereitung zur Frisurgestaltung
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DE102005001820A1 (de) 2005-01-13 2006-08-10 Beiersdorf Ag Haarsprayformeln mit hohen VOC-Anteilen und mit einem Terpolymer aus Methacrylsäure, Methylmethacrylat, Hydroxyethylmethacrylat und Butylacrylat
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KR20000022807A (ko) 2000-04-25
CN1247738A (zh) 2000-03-22
BR9917177A (pt) 2001-12-11
CN1140249C (zh) 2004-03-03
EP0985401A2 (en) 2000-03-15
DE69936172T2 (de) 2008-01-31
US20010003581A1 (en) 2001-06-14
US6368575B2 (en) 2002-04-09
JP2000086469A (ja) 2000-03-28
DE69936172D1 (de) 2007-07-12
JP4240676B2 (ja) 2009-03-18
CA2281053A1 (en) 2000-03-11
BRPI9917177B1 (pt) 2016-01-19
EP0985401A3 (en) 2001-09-05

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